How it works
One quiet workflow. One sensor in motion.
Vessel is an end-to-end process designed around a single insight: the only thing worth returning is the data. Everything else stays with the customer.
Pack and ship as you do today
Vessel provides a right-sized, recyclable insulated shipper with phase-change packs qualified for 2–8°C or 15–25°C CRT.
A Vessel logger is sealed inside at the picker step — no new motion in your ops workflow. The carrier label and a sensor-return label are co-located on the outer parcel.
- Single SKU per temp range — no logger SKU confusion
- Sensor-return label deterministically maps the logger to the shipment
- Works with any carrier you already use
The logger captures the full profile
The in-house STM32 logger samples temperature every 15 seconds (5 seconds during any excursion), records battery voltage and tamper inputs, and writes signed records to internal flash with on-device CRC16.
It runs on two AAA primary cells. No connectivity, no SIM card, no carrier dependencies — by deliberate design, this is the lowest-cost compliant path.
- STTS22H temperature sensor, calibrated and traceable
- RTC-driven low-power sleep between samples
- Event log: BOOT, NORMAL, EXCURSION, TAMPER, LOW_BATT, CFG_CHANGE
The receiver keeps the box
The specialty pharmacy or downstream customer unpacks the shipment and uses the contents. The insulated box is theirs — they reuse it the way they already reuse received boxes, or recycle it.
They drop the logger into the pre-paid sensor-return mailer and toss it in any outgoing mail. The mailer is small and light; freight cost is a fraction of returning a full box.
- No reverse pickup coordination
- No customer resentment about losing reusable boxes
- Truly minimal effort at the receiving site
We read, compute MKT, sign the record
When the logger arrives back at a Vessel processing site we read it over USB, parse the dump, compute mean kinetic temperature, identify excursions against the lane spec, and write a tamper-evident signed record to the platform.
Your QA team receives the compliance record and can release, hold, or reject the lot — all from the Vessel dashboard, with the audit trail attached.
- MKT and dwell-out-of-spec computed per shipment
- Part 11–style audit trail on every record action
- Signed PDF available for downstream customers and auditors